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PODCAST

The Primal Shift

Primal Shift is about helping you achieve optimal health by bridging the gap between ancestral living and the demands of modern society. We"ll talk about every aspect of a healthy life, including sleep, nutrition, exercise, stress management, environmental toxins, hormesis, belonging and tribalism, and reconnecting with nature. Get ready to unlock the transformative power of nature as the ultimate biohack, revolutionize your health and reconnect you with your primal self. Each episode is short and

health & fitness nutrition

All Episodes

20:32

102: Everyday Products That Destroy Hormones

The Primal Shift ·

2025/07/30

Too much estrogen — even the fake kind — is wrecking our health. In this episode, Kathy and I break down the hidden endocrine disruptors lurking in your bathroom: shampoos, lotions, deodorants, candles, and even “natural” products that aren’t so natural. We share the exact non-toxic swaps we’ve made over the years (without breaking the bank), and why some “clean” labels still aren’t enough. We also dive into feminine health, EMF mitigation, and the real reason birth control might be one of the most

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33:01

101: Hidden Toxins at Home: What You're Doing Wrong

The Primal Shift ·

2025/07/23

In this episode, Kathy and I unpack how we reduced our exposure to environmental toxins—from improving tap water safety and installing water filtration systems, to replacing plastic containers and upgrading to non-toxic cookware. We talk about chlorine exposure in showers and pools, how we built a more toxin-free home, and why choosing organic food and chemical-free living matters more than you think. Got questions or already making changes at home? Drop a comment—we’d love to hear from you. Learn

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11:05

100: Why Vegan Diets Kill 7.3 B Critters

The Primal Shift ·

2025/07/15

When most people think about saving the planet, they picture cutting back on meat and eating more plants. But what if the story we’ve been told about how plant-based diets equate to sustainability is missing half the truth (and hiding a massive environmental cost)? In this episode of the Primal Shift Podcast, I pull back the curtain on the industrial food system most people never see. From the 90 billion honeybees trucked across the country each spring to pollinate almond trees to the 7.3 billion

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12:11

99: Plants vs Animals: Why Meat Beats Plants for...

The Primal Shift ·

2025/07/02

For most of human history, survival depended on eating the foods that gave us the most nutrients with the least effort. That usually meant animals, which are dense in protein, fat, and bioavailable vitamins and minerals. But in recent years, we’ve been told that plants are the true superfoods. Raw kale in your smoothie? Spinach salads every day? The darker and leafier, the better, right? Not quite. In this episode, I dive into the real story behind plant-based foods and the antinutrients they

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25:04

98: This Is SPIKING Your Blood Sugar | Levels App +...

The Primal Shift ·

2025/06/25

It’s easy to assume that food affects everyone the same way. But when my wife Kathy and I wore continuous glucose monitors for two weeks, we learned just how different our responses actually are. For example, a bowl of curry or a few slices of sourdough bread would send her blood sugar soaring while barely impacting mine, and vice versa. We weren’t just tracking data: we were uncovering real-time insight into how our individual metabolisms, hormones, stress, and even muscle mass shape our daily

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10:49

97: Are You Biohacking or Just Bullsh-tting?

The Primal Shift ·

2025/06/18

Biohacking wasn’t always about gadgets. It used to be about building a better lifestyle by fixing root causes with movement, light, food and sleep. But somewhere along the way, optimization gave way to outsourcing. Today, it’s easy to mistake a tech solution for progress when it’s really just a more expensive version of the same mistake: treating symptoms instead of addressing causes. That shift was on full display at a recent biohacking conference I attended, where nearly every product promised

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13:05

96: Is Sourdough Bread Actually Healthy?

The Primal Shift ·

2025/06/04

Have you noticed how everyone seems obsessed with sourdough bread lately? Well, my wife and I have been experimenting with sourdough baking for a couple of years now, and in this episode, I'm breaking down the real story behind sourdough. Is it truly healthier, or is that just hype? I'll walk you through why sourdough might digest easier, how it impacts nutrient absorption, and what types of flour you should (and shouldn't!) use. Plus, I’ll share our personal experiences, what works for us and how

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17:29

95: My “Pre-Workout” Routine (That’s Actually Just My...

The Primal Shift ·

2025/05/28

In this episode, I break down exactly what I do before a CrossFit workout. No powders, no hype—just the simple stuff that works. Hydration, black coffee, a walk with the dog, some sunlight, and a cold plunge to boost performance and focus. This is the exact routine I follow to feel ready—physically and mentally—before I step into the box. Learn more: Use code MICHAELKUMMER to get 10% off your DeltaG order: https://michaelkummer.com/go/deltagketones Use code YOUTUBE to get 20% OFF our newest

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12:30

94: Stop Wasting Your Money on These 9 Biohack Devices!

The Primal Shift ·

2025/05/21

I’ve reviewed a ton of health and wellness gear over the years — some of it genuinely helpful, and some of it so absurd that I don’t know whether to laugh or cry. So in this episode, I’m doing something a little different: I’m walking you through the most useless health gadgets I’ve come across lately. Not just things I wouldn’t recommend, but things I think you should actively avoid. We’re talking Bluetooth forks that vibrate when you eat too fast. AI smoothie machines with subscription pods

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10:36

93: Does Cold Plunging Make You Die Sooner?

The Primal Shift ·

2025/05/14

Someone recently told me about a Mayo Clinic researcher who claimed that cold plunging triggers the same chemical response in the body as dying — and that, basically, you die a little every time you do it. I couldn’t believe what I was hearing. Apparently, cold plunging is now a near-death experience, and there’s “no credible evidence” it offers any benefits. Right. Look, I’m the first to say cold plunging isn’t a miracle cure. But this take is just flat-out absurd. So in this episode, I unpack

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22:52

92: Healthy Living Hacks That Save You Money Daily

The Primal Shift ·

2025/05/07

Living healthy doesn’t have to mean going broke. Yes, pasture-raised eggs, non-toxic furniture, and sauna setups can get ridiculously expensive — but that doesn’t mean you have to compromise your health just because you’re on a budget. In this episode, I walk through a number of practical swaps and cost-saving strategies you can leverage to live healthy without overspending. From cold plunging in natural bodies of water instead of buying a $5,000 tub (no, it’s not the same, but it’s close enough if

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11:25

91: How to Know If Food Is Good for You!

The Primal Shift ·

2025/04/30

With so many conflicting studies and experts shouting from every corner, it’s easy to lose sight of one simple truth: your body knows best. In this episode of the Primal Shift Podcast, I’m calling out the noise around “good” vs. “bad” foods and diving straight into the powerful signals your body sends every time you eat. From unexplained breakouts and weird cravings to stubborn heartburn and crashing energy levels, your physiology is practically begging you to pay attention. We’ll explore how issues

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15:16

90: Should You Force Kids to Eat?

The Primal Shift ·

2025/04/23

It’s dinnertime. You’ve cooked up a tasty meal and the whole family gathers around the table, only for your child to declare, “I’m not hungry!” Sound familiar? In this episode of the Primal Shift Podcast, we’re taking on one of the trickiest aspects of parenting: navigating those moments when your kids refuse to eat, either out of genuine lack of hunger or just a desire for something else (like dessert). We’ll talk about why rigid mealtimes might clash with our kids’ natural hunger signals, why

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06:49

89: Should You Stop Eating Egg Whites?

The Primal Shift ·

2025/04/16

In my widely-read article about how I cured my IBS symptoms, I recommended against eating eggs in the early stages of gut healing. And I got plenty of pushback for that recommendation. I understand why. Eggs are hailed as nature’s perfect superfood, have been a dietary staple for centuries, and their nutrient-packed yolks truly are nutritional powerhouses. But not all parts of the egg are created equal, and the whites might be secretly sabotaging your digestion. In this episode, I break down the

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16:35

88: Why Calorie Counting Fails Every Time

The Primal Shift ·

2025/04/09

Counting calories seems logical on the surface: just burn more calories than you eat and you'll lose weight, right? But what if this seemingly straightforward advice is deeply flawed, inaccurate, and a massive waste of your time? In this episode of the Primal Shift Podcast, I’m challenging one of the most entrenched myths in the health and fitness community: calorie counting. The truth is, your body isn’t a simple calculator — it’s a dynamic, complex system influenced by hormones, metabolism, and

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13:33

87: 8 Beef Myths Busted: What Science Actually Says

The Primal Shift ·

2025/04/02

For decades, beef has been painted as the villain on our plates, blamed for heart disease, cancer, climate change, obesity, and even poor digestion. But have you ever stopped to question if these claims are backed by solid science, or are simply myths repeated often enough that they’ve become “common knowledge?” In this eye-opening episode of the Primal Shift Podcast, we’re cutting straight to the facts about beef, debunking one myth at a time. Is beef really clogging arteries, causing cancer, and

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52:43

86: The Truth About Running & Longevity | With Brad...

The Primal Shift ·

2025/03/26

As a former pro triathlete, Brad Kearns used to push himself to the extremes of human endurance. He competed globally, chasing medals and personal records, only to eventually confront a humbling truth: his intense cardio regimen wasn’t building him up — it was slowly breaking his body down. Overtraining left him exhausted, inflamed, and far from the image of optimal health he once envisioned. Today, Kearns sees fitness differently. Rather than pushing endless mileage, he’s embraced shorter, more

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06:42

85: Sleep Before Midnight: Does It Really Matter?

The Primal Shift ·

2025/03/19

We like to think we can bend the rules when it comes to our sleep routine — for instance, by sleeping in after staying up late. And it’s true that sometimes that practice can leave us feeling just fine. But just because your body adapts to a late-night routine doesn’t mean it thrives on one. Sleep isn’t just about getting enough hours; it’s about getting them at the right time. And if you’re pushing your bedtime later and later, you could be sacrificing the most restorative phases of sleep without

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41:19

84: Why I Quit Alcohol & Started Cold Therapy -...

The Primal Shift ·

2025/03/12

For Ciaran Flanagan, quitting alcohol wasn’t about having hit rock bottom — it was about realizing just how much better life could be without it. Like a lot of people growing up in Ireland, drinking was part of the culture he grew up in. He wasn’t an alcoholic, but he found himself caught in the same cycle so many people fall into: weekend drinking that derailed his focus, energy, and productivity for days. But after a month without alcohol, everything changed. His brain fog lifted, his sleep scores

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13:15

83: Understanding Testosterone Production

The Primal Shift ·

2025/03/05

Testosterone is the engine of vitality and the foundation of muscle growth, energy, focus and resilience. Unfortunately, modern life can make it hard to maintain optimal levels, due to factors like poor diet, chronic stress and environmental toxins that can disrupt production at every step of the process. In this episode, we break down how testosterone is made, including why nutrient-dense foods (especially those rich in cholesterol, zinc, and Vitamin D) are critical, and how deficiencies in these

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